Hey Getin
I just bought a Diawa Samurai 7i 2500 reel off a guy because the cover, bail trip and spring came off and got lost. The bail won't close automatically without those parts so he sold it for $10. I figured Diawa is a good reel and I don't have their brand so I bought it.
I sure hope this is not a reacurring problem with Diawa reels, the reel I bought was totally dry (no lube at all) and all the screws were loose. Because of the loose screws, that's how the parts came off while fishing and got lost. I went to Gagnon Sports to check on the part, they don't have it and told me Diawa is in Missisauga, $13 shipping plus the part $? and the repair would cost more than the price of the reel. Call them for the phone # to Diawa Canada.
I made bail trip with my dremel and it is working, it will auto close the bail without a spring 80% of the time. I even tried taking an old spring and uncoiling it and reshaping it to make it re-set the bail trip, but the spring was not strong enough. It's still a work in progress.
Can you post some picks of what the old part and your reel looks like? I assume you have the part #, but here is a great site for reel schematics, free to download.
http://www.mikesreelrepair.com/schematics/index.php?cat=4
Here is my reel, the black piece is the part I cut from a sheet of ABS plastic. I don't plan on ever getting the orginal parts to fix it b/c I'm in Scarb and going to Miss or order is not worth the reel. I'am not impressed with Diawa low end reels. None of my other reels (14 of them all bought new) are lube dry like this one. It's a nice reel with top ratings but it will take me time to come up with a solution and to rebalance the reel to eliminate the wobble from the missing cover.
http://s1231.photobucket.com/albums/ee505/mrgrubman/
I hope I got the right link, it's my first time using photobucket.
I'll try to figure out how to fix it cheap cheap.........